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Ques:- You need to create a new group called sales with Bob, Mary and Joe as members. Which of the following would accomplish this?Choose one:a. Add the following line to the /etc/group file: sales:44:bob,mary,joeb. Issue the command groupadd sales.c. Issue the command groupadd -a sales bob,mary,joed. Add the following line to the /etc/group file: sales::44:bob,mary,joe
Ques:- What are promises and async await in JavaScript
Right Answer:
Promises in JavaScript are objects that represent the eventual completion (or failure) of an asynchronous operation and its resulting value. They allow you to handle asynchronous code more easily by providing methods like `.then()` for success and `.catch()` for errors.

`async` and `await` are syntactic sugar built on top of promises. An `async` function always returns a promise, and within an `async` function, you can use `await` to pause execution until a promise is resolved, making the code easier to read and write as if it were synchronous.
Ques:- What are semantic HTML elements and why are they important
Right Answer:
Semantic HTML elements are tags that clearly describe their meaning in a human- and machine-readable way, such as `<header>`, `<article>`, `<footer>`, and `<section>`. They are important because they improve accessibility, enhance SEO, and make the structure of the web page clearer for developers and browsers.
Ques:- What is AJAX and how does it work
Right Answer:
AJAX (Asynchronous JavaScript and XML) is a web development technique that allows web pages to communicate with a server and update content asynchronously without reloading the entire page. It works by using JavaScript to send requests to the server, which can return data (often in JSON or XML format) that the browser can then use to update the webpage dynamically.
Ques:- What is the difference between inline inline block and block elements
Right Answer:
Block elements take up the full width available and start on a new line (e.g., `<div>`, `<h1>`). Inline elements only take up as much width as necessary and do not start on a new line (e.g., `<span>`, `<a>`). Inline-block elements are similar to inline elements but can have width and height set, and they respect margins and padding (e.g., `<img>`, `<button>`).
Ques:- What is the difference between HTML and HTML5
Right Answer:
HTML5 is the latest version of HTML, which includes new features such as native support for audio and video, new semantic elements (like `<article>`, `<section>`, and `<header>`), improved parsing rules, and better support for web applications with APIs like local storage and canvas. HTML, on the other hand, refers to earlier versions that lack these enhancements.
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